Enhanced hydrogen embrittlement of low-carbon steel to natural gas/hydrogen mixtures
Enhanced hydrogen embrittlement of low-carbon steel to natural gas/hydrogen mixtures
复制标题
DOI：
10.1016/j.scriptamat.2020.08.011
复制
发表时间：
2020-12
影响因子：
6
通讯作者：
Shang Juan;Weifeng Chen;Jinyang Zheng;Z. Hua;Lin Zhang;Chengshuang Zhou;C. Gu
中科院分区：
文献类型：
--
作者：
Shang Juan;Weifeng Chen;Jinyang Zheng;Z. Hua;Lin Zhang;Chengshuang Zhou;C. Gu
采用疲劳裂纹扩展速率(FCGR)试验研究了低碳钢在实际天然气/氢和二氧化碳/氢/氮混合气体中的疲劳性能。首次发现FCGR在混合气体中的加速速度远快于在氢气和天然气中的速度。天然气/氢混合气体使断裂模式由延性疲劳条纹断裂转变为脆性解理断裂，并限制了裂纹周围的变形活动。二氧化碳和氢气对材料的协同作用是造成钢在混合物中性能异常的主要原因。
Fatigue crack growth rate (FCGR) tests were used to investigate the fatigue property of low-carbon steel in actual natural gas/hydrogen mixtures and carbon dioxide/hydrogen/nitrogen mixtures. It is found for the first time that the acceleration of FCGRs in the mixtures are much faster than that in hydrogen or natural gas. Natural gas/hydrogen mixtures changed the fracture mode from ductile fatigue striation to brittle cleavage fracture, and restricted the deformation activities around the crack. Synergy effect of carbon dioxide and hydrogen on the material is proposed to be the major reason for the abnormal performance of steel in the mixtures.